# FFTW3_INCLUDE_DIR - where to find fftw3.h
# FFTW3_LIBRARIES - List of libraries when using FFTW.
# FFTW3_FOUND - True if FFTW found.
+#
+# The FFTW3 root installation directory can be provided in the FFTW3_ROOT_DIR
if (FFTW3_INCLUDE_DIR AND FFTW3_LIBRARIES)
# Already in cache, be silent
set (FFTW3_FIND_QUIETLY TRUE)
endif (FFTW3_INCLUDE_DIR AND FFTW3_LIBRARIES)
-find_path (FFTW3_INCLUDE_DIR fftw3.h
- CACHE STRING "Path to headers for double precision FFTW3")
+file(TO_CMAKE_PATH "$ENV{FFTW3_ROOT_DIR}" _env_FFTW3_ROOT_DIR)
+find_path (FFTW3_INCLUDE_DIR fftw3.h
+ PATHS "${_env_FFTW3_ROOT_DIR}/include"
+ CACHE STRING "Path to double precision FFTW3 headers")
find_library (FFTW3_LIBRARIES
NAMES fftw3
- PATHS "${FFTW3_INCLUDE_DIR}/../lib"
+ PATHS "${_env_FFTW3_ROOT_DIR}/lib"
+ "${FFTW3_INCLUDE_DIR}/../lib"
CACHE STRING "Double precision FFTW3 libraries")
-
# handle the QUIETLY and REQUIRED arguments and set FFTW_FOUND to TRUE if
# all listed variables are TRUE
include (FindPackageHandleStandardArgs)
-find_package_handle_standard_args (FFTW3 DEFAULT_MSG FFTW3_LIBRARIES FFTW3_INCLUDE_DIR)
+set(__MSG "Could not find FFTW3. Provide the fftw3 install directory in the FFTW3_ROOT_DIR environment variable.")
+find_package_handle_standard_args (FFTW3 ${__MSG} FFTW3_LIBRARIES FFTW3_INCLUDE_DIR)
mark_as_advanced (FFTW3_LIBRARIES FFTW3_INCLUDE_DIR)